msm: gpio: Add v2 gpio support to MSM SoCs.

obj-$(CONFIG_ARCH_MSM7X30) += gpiomux-7x30.o gpiomux-v1.o gpiomux.o

obj-$(CONFIG_ARCH_QSD8X50) += gpiomux-8x50.o gpiomux-v1.o gpiomux.o

obj-$(CONFIG_ARCH_MSM8X60) += gpiomux-8x60.o gpiomux-v2.o gpiomux.o

ifndef CONFIG_MSM_V2_TLMM

ifdef CONFIG_MSM_V2_TLMM

obj-y	+= gpio-v2.o

else

obj-y	+= gpio.o

endif

/* Copyright (c) 2010, Code Aurora Forum. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and

 * only version 2 as published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

 * 02110-1301, USA.

 *

 */

#include <linux/gpio.h>

#include <linux/io.h>

#include <linux/irq.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/spinlock.h>

#include <mach/msm_iomap.h>

#include "gpiomux.h"

/* Bits of interest in the GPIO_IN_OUT register.

 */

enum {

	GPIO_IN_BIT  = 0,

	GPIO_OUT_BIT = 1

};

/* Bits of interest in the GPIO_CFG register.

 */

enum {

	GPIO_OE_BIT = 9,

};

#define GPIO_CONFIG(gpio)         (MSM_TLMM_BASE + 0x1000 + (0x10 * (gpio)))

#define GPIO_IN_OUT(gpio)         (MSM_TLMM_BASE + 0x1004 + (0x10 * (gpio)))

static DEFINE_SPINLOCK(tlmm_lock);

static int msm_gpio_get(struct gpio_chip *chip, unsigned offset)

{

	return readl(GPIO_IN_OUT(offset)) & BIT(GPIO_IN_BIT);

}

static void msm_gpio_set(struct gpio_chip *chip, unsigned offset, int val)

{

	writel(val ? BIT(GPIO_OUT_BIT) : 0, GPIO_IN_OUT(offset));

}

static int msm_gpio_direction_input(struct gpio_chip *chip, unsigned offset)

{

	unsigned long irq_flags;

	spin_lock_irqsave(&tlmm_lock, irq_flags);

	writel(readl(GPIO_CONFIG(offset)) & ~BIT(GPIO_OE_BIT),

		GPIO_CONFIG(offset));

	spin_unlock_irqrestore(&tlmm_lock, irq_flags);

	return 0;

}

static int msm_gpio_direction_output(struct gpio_chip *chip,

				unsigned offset,

				int val)

{

	unsigned long irq_flags;

	spin_lock_irqsave(&tlmm_lock, irq_flags);

	msm_gpio_set(chip, offset, val);

	writel(readl(GPIO_CONFIG(offset)) | BIT(GPIO_OE_BIT),

		GPIO_CONFIG(offset));

	spin_unlock_irqrestore(&tlmm_lock, irq_flags);

	return 0;

}

static int msm_gpio_request(struct gpio_chip *chip, unsigned offset)

{

	return msm_gpiomux_get(chip->base + offset);

}

static void msm_gpio_free(struct gpio_chip *chip, unsigned offset)

{

	msm_gpiomux_put(chip->base + offset);

}

static struct gpio_chip msm_gpio = {

	.base             = 0,

	.ngpio            = NR_GPIO_IRQS,

	.direction_input  = msm_gpio_direction_input,

	.direction_output = msm_gpio_direction_output,

	.get              = msm_gpio_get,

	.set              = msm_gpio_set,

	.request          = msm_gpio_request,

	.free             = msm_gpio_free,

};

static int __devinit msm_gpio_probe(struct platform_device *dev)

{

	int ret;

	msm_gpio.label = dev->name;

	ret = gpiochip_add(&msm_gpio);

	return ret;

}

static int __devexit msm_gpio_remove(struct platform_device *dev)

{

	int ret = gpiochip_remove(&msm_gpio);

	if (ret < 0)

		return ret;

	set_irq_handler(TLMM_SCSS_SUMMARY_IRQ, NULL);

	return 0;

}

static struct platform_driver msm_gpio_driver = {

	.probe = msm_gpio_probe,

	.remove = __devexit_p(msm_gpio_remove),

	.driver = {

		.name = "msmgpio",

		.owner = THIS_MODULE,

	},

};

static struct platform_device msm_device_gpio = {

	.name = "msmgpio",

	.id   = -1,

};

static int __init msm_gpio_init(void)

{

	int rc;

	rc = platform_driver_register(&msm_gpio_driver);

	if (!rc) {

		rc = platform_device_register(&msm_device_gpio);

		if (rc)

			platform_driver_unregister(&msm_gpio_driver);

	}

	return rc;

}

static void __exit msm_gpio_exit(void)

{

	platform_device_unregister(&msm_device_gpio);

	platform_driver_unregister(&msm_gpio_driver);

}

postcore_initcall(msm_gpio_init);

module_exit(msm_gpio_exit);

MODULE_AUTHOR("Gregory Bean <gbean@codeaurora.org>");

MODULE_DESCRIPTION("Driver for Qualcomm MSM TLMMv2 SoC GPIOs");

MODULE_LICENSE("GPL v2");

MODULE_ALIAS("platform:msmgpio");